Saw big



July 18, 1944. ADAMS 2,354,095

SAW RIG Filed May 17, 1945 3 Sheets-Sheet l I n 11211 for f I 5 Ewes? JAdams y zww Q0162.

' y A tron/c E. D. ADAMS July 18, 1944.

SAW RIG Filed May 17, 1943 3 Sheets-Sheet 2 Inventor Ewes? ,F Mp2s July18, 1944. Y E. D. 'ADAMS.

SAW RIG Filed May 17, 1943 3 Sheets-Sheet 5 Inventor IIIIIIIIHIIII 2oEzzesifl idam Patented July 18, 1944 UNITED STATES PATENT OFFICE ErnestD. Adams, Athol, Mass. Application May 17, 1943, Serial No. 487,321

1 Claim.

The present invention relates to new and useful improvements in saw rigsand has for one of its important objects to provide a self-contained,

power actuated machine of this character which is adapted to beconveniently moved from place to place.

Another very important object of the invention is to provide, in amanner as hereinafter set forth, a portable saw rig of theaforementioned character, comprising a novel construction andarrangement whereby the saw may be readily adjusted to substantially anydesired position for felling trees, cutting logs, etc.

Other objects of the invention are to provide a portable, power-drivensaw rig of the character described which will be comparatively simple inconstruction, strong, durable, highly eflicient and reliable in use andwhich may be manufactured at low. cost.

All of the foregoing and still further objects and advantages of theinvention will become apparent from a study of the followingspecification, taken in connection with the accompanying drawingswherein like characters of reference designate corresponding partsthroughout the several views, and wherein:

Figure 1 is a view in end elevation of a portable saw rig constructed inaccordance with the present invention. I

Figure 2 is a top plan view of the machine.

Figure 3 is a side elevational view.

Figure 4 is a view in vertical section, taken substantially on the line44'of Figure 2.

Referring now to the drawings in detail, it will be seen that theembodiment of the invention which has been illustrated comprises a.frame I of suitable dimensions and material, said frame beingsubstantially rectangular in plan. Extending transversely beneath oneend portion of the frame I is an axle 2 having mounted thereon pneumatictire equipped supporting wheels I. Also mounted on this end portion ofthe frame I is a suitable engine 4. Legs 5 support the other end portionof the frame I, said legs being provided with braces 8.

Mounted on one side of the frame I, at an intermediate point, is a mastl of substantially U- shaped construction. Rotatably mounted in theupper portion of the mast I is a drum 8. A hand crank 9 is provided foractuating the drum 8. A stop pin in on the mast I is engageable in thehand crank 9 for securing the drum 8 against rotation when desired.

Metallic straps II are mounted vertically on the lower portions of thelegs I2 of the mast I ISO in spaced relation thereto. A verticalmetallic plate I8 is mounted for sliding adjustment between the strapsand the mast members I2. Bolts I4 secure the plate I3 in adjustedposition. The bolts I4 are engage'able selectively in openings I5 whichare provided therefor in the plate I3.

Journaled transversely on the frame I is a drive shaft I6 havinginterposed therein a splined universal joint I1. I The shaft I8 isdriven from the engine 4' through a dual V-belt and a V-pulleyconnection I8. One end portion of the shaft I8 is Journaled in asuitable hearing which, in turn, is pivotally mounted in a hanger I8 onthe side of the. frame I which is remote from the mast I. The other endportion of the shaft I8 extends through the plate I8 and is Journaledtherein.

Mounted for rotary adjustment about the shaft I6 on the outer face ofthe plate I3 is a plate 20. See Figs. 3 and 4. The plate 20 has formedtherein an arcuate slot 2i which is concentric with the shaft I6. Theslot 2I accommodates a bolt 22 in the plate I3 for securing the plate 28in adjusted position.

Arms 23 project laterally from the adjustable plate 20. Journaled insuitable bearings provided therefor in the arms 23 is a shaft 24 whichparallels the frame I. Beveled gears 25 connect the shaft 24 to theshaft I6 for actuation thereby.

A sectional, longitudinally adjustable boom 26 is mounted for swingingmovement on the shaft 24. Toward this end, the boom 28 includes, on itsinner end, a yoke 21 which is journaled on the end portions of the shaft24. Mounted on the outer or free end portion of the boom 28 is. a circular saw 28. A dual V belt and pulley connection 29 drives the saw 28from the shaft 24. A cable 30 has one end connected to the boom 28 andits other end secured to the drum 8 for winding thereon for swinging thesaw 28 upwardly and downwardly. Guy wires or cables 3i extend betweenthe upper portion of the mast 'I' and the side of the frame I which isremote from said mast.

It is thought that the operation of the machine will be readily apparentfrom a consideration of the foregoing. Briefly, when it is desired tofell trees,'the bolt 22 is loosened and the plate 28 is rotatablyadjusted to the position shown in dotted lines in Figure 4 of thedrawings for turning .the saw 28 to a horizontal plane, after which thebolt 22 is. again tightened. Of course, the engine 4 drives the saw 28through the belts I8 and 29, the shafts I5 and 24, etc. If desired, asuitable clutch may be interposed in the drive from the engine 4. Thesaw is engaged with the trunk of the tree and fed therethrough byswinging the boom 26 in a horizontal plane. Vertical adjustment of thesaw for making the cut at different elevations may be had b raising orl0wering the plate II with the assembly thereon. When logs are to becut, the saw 28 is adjusted or positioned in a vertical plane andlowered into engagement with the work. The boom 26, with the sawthereon, is swung upwardly and downwardlythrough the medium of the drum8 and the cable 30. The sections 32 of the boom 2 6 are adiustablyconnected at 33. The adjustability of the boom 28 permits the tension ofthe belts 19 to be regulated as desired. Projecting longitudinally fromthe outer end of the boom 26 is an arm 34. The arm 34 is adapted to havebolted thereto an extension in the form of a saw bench or table tofacilitate cutting up limbs, etc., if desired.

It is believed that the many advantages of a portable saw rigconstructed in accordance with the present invention will be readilyunderstood, and although a preferred embodiment of the machine is asillustrated and described, it is to be understood that changes in thedetails of construction and in the combination and arrangement of partsmay be resorted to which will fall within the scope of the invention asclaimed.

What is claimed is:

A saw rig of the character described, comprising a wheel supportedframe, an engine mounted on said frame, a mast of substantially U-shapedconstruction rising from the frame, metallic straps mounted verticallyon the lower portions of the legs of the mast in spaced relationthereto, a vertical plate slidably and non-rotatably mounted at its endsfor adjustment in a vertical plane between the straps and the legs ofthe mast, means for securing the plate in adjusted position, a shafthaving one end portion extending transversely through and journaled inthe plate, means connected to the other end of the shaft for driving theshaft from the engine, a second vertical plate rotatably adjustable in avertical plane about said shaft and disposed at the outer side of saidfirst-named plate, means for releasably securing the second named platein rotatably adjusted position relative to the first named plate,

a shaft journaled on the second named plate transversely of thefirst-named shaft. gears conmeeting the second named shaft to the firstnamed shaft for actuation thereby, a boom mounted for swinging movementon the second named shaft, a circular saw rotatably mounted on the boomon an axis transversely of the latter, means connecting the circular sawto the second named shaft for actuation thereby, a drum mounted on theupper portion of the mast, and a cable connecting the mast to the drumfor raising and lowering thereby.

ERNEST D. ADAMS.

